Stateguy

I have a trek Farley ( green in color if hat tells you what model)
I need to put sealant in the tire and was wondering if it’s hard to do
i was going to use stans
can anyone give me any pointers on what to look out for. Is it easy to do
there was sealant already in the tire ( not sure of brand

Darth Lefty 

Yes, it's easy. You can use a tire lever and pull the tire off a little. Then just pour some in. But tubeless tires are tight. So you can also take out the valve core and use an injector, which is just a big syringe with a plastic tube. Orange Seal sells a squeeze bottle with an injector lid, and Stan's sells little 2oz bottles for your flat kit.

Even if you get one of these get a jug too, you need like 4oz per tire on a fat bike. It's not important to get the amount exactly right.

You don't need to take the old stuff out unless it's not latex like these two

roskobosko

Let the air out, take out the core, squeeze in the sealant direct from the bottle, replace the core, add air, go for a ride. So easy I can do it. Park makes a gizmo to remove the core but it's not mandatory, I'm just lazy.

https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1

Kapusta

The easiest way is to remove the presta valve core and inject it through there.

What I would do is

1- remove the core.
2- with the valve at 6 o’clock, use some sort of dipstick to see if there is still sealant in the tire.
3- if it is dry or low, inject sealant through the valve.
4- replace core, and pump up tires.

Assuming the sealent is latex (which it most likely is) you can mix brands. Chances are that if what is in there now is white, it is Stans, if Orange, it is Orange Seal. No guarantee about either, but a reasonable guess.

fietsbob

same stuff for car tires will be cheaper than the niche bicycle market..

fietsbob

Or, a portion of one tire bead off, pour it in , bead back in the rim, re inflate the tire.